| SPENO | Date | Species | Sex | Age | Molt Status | Mass (kg) | Bio-logger Type & Location | |
|---|---|---|---|---|---|---|---|---|
| SPLASH | SPOT6 | |||||||
| HF2024_1001 | 2024-04-28 | Ribbon seal | Female | Pup | Pre-molt (lanugo) | 17.4 | -- | -- |
| HF2024_1002 | 2024-04-29 | Ribbon seal | Female | Adult | Pre-molt | 71.6 | Head | Flipper |
| PL2024_1003 | 2024-04-29 | Spotted seal | Female | Sub-adult | Post-molt | 45.2 | Nape | Flipper |
| PL2024_1004 | 2024-05-01 | Spotted seal | Male | Pup | Active (lanugo) | 20.8 | -- | -- |
| PL2024_1005 | 2024-05-01 | Spotted seal | Male | Young-of-Year | Active (lanugo) | 39.0 | -- | -- |
| HF2024_1006 | 2024-05-07 | Ribbon seal | Male | Young-of-Year | Post-molt | 25.2 | Nape | -- |
| HF2024_1007 | 2024-05-09 | Ribbon seal | Male | Sub-adult | Pre-molt | 73.0 | -- | Flipper |
| PL2024_1008 | 2024-05-11 | Spotted seal | Female | Pup | Active (lanugo) | 27.0 | -- | -- |
| HF2024_1009 | 2024-05-12 | Ribbon seal | Male | Adult | Active | 66.4 | -- | Flipper |
| PL2024_1010 | 2024-05-13 | Spotted seal | Male | Young-of-Year | Post-molt | 22.0 | Nape | -- |
| HF2024_1011 | 2024-05-13 | Ribbon seal | Female | Young-of-Year | Active (lanugo) | 28.9 | -- | -- |
| HF2024_1012 | 2024-05-17 | Ribbon seal | Female | Adult | Post-molt | 87.9 | Head | Flipper |
| PL2024_1013 | 2024-05-17 | Spotted seal | Male | Young-of-Year | Post-molt | 20.6 | Nape | -- |
| PL2024_1014 | 2024-05-19 | Spotted seal | Male | Young-of-Year | Post-molt | 26.3 | Nape | -- |
| HF2024_1015 | 2024-05-19 | Ribbon seal | Female | Sub-adult | Post-molt | 40.0 | Head | Flipper |
| PL2024_1016 | 2024-05-20 | Spotted seal | Male | Young-of-Year | Post-molt | 18.0 | Nape | -- |
| PL2024_1017 | 2024-05-20 | Spotted seal | Female | Sub-adult | Active | 32.8 | Nape | Flipper |
| PL2024_1018 | 2024-05-21 | Spotted seal | Male | Sub-adult | Active | 28.0 | Nape | Flipper |
| HF2024_1019 | 2024-05-21 | Ribbon seal | Male | Adult | Active | 68.8 | -- | Flipper |
| PL2024_1020 | 2024-05-21 | Spotted seal | Female | Young-of-Year | Post-molt | 20.0 | Nape | -- |
| HF2024_1021 | 2024-05-22 | Ribbon seal | Female | Adult | Active | 79.9 | -- | Flipper |
| PL2024_1022 | 2024-05-22 | Spotted seal | Female | Adult | Post-molt | 79.6 | Nape | Flipper |
| PL2024_1023 | 2024-05-22 | Spotted seal | Female | Adult | Active | 114.6 | -- | Flipper |
| HF2024_1024 | 2024-05-23 | Ribbon seal | Female | Adult | Active | 55.0 | Head | Flipper |
| PL2024_1025 | 2024-05-23 | Spotted seal | Female | Young-of-Year | Post-molt | 22.0 | Nape | -- |
Movement Ecology and Behavior of Ribbon and Spotted Seals in the Bering Sea, 2024
Warning
The information on this page is automatically updated every hour and without any significant quality checks. Errors may be present and are likely. We are providing access to the information in a public forum in the spirit of open science and to provide easy access to updated information for the authors and interested researchers.
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The scientific results and conclusions, as well as any views or opinions expressed herein, are those of the author(s) and do not necessarily reflect the views of NMFS, NOAA, or the Department of Commerce.
Sampling and Deployment Summary
Predicted Movements
Each seal is released with a bio-logger that provides regular updates on movement and behavior. For each seal, the observed locations are used to fit a predicted path. Both the predicted track (line) and the observed bio-logger locations (points) are shown on the map. The ship track of the R/V Norseman II is shown in black and can be toggled on/off using the layer selector in the upper left corner.
Because some of the tracks span the 180 anti-meridian, you may need to re-center and zoom the map to the Bering Sea region.
Haul-out Behavior
Each of the bio-loggers are programmed to report the percentage of time the device was dry for each hour. For example, a seal that was hauled out for an entire hour would report as 100% dry. The hours are shown as UTC hours. To adjust for apparent solar noon, subtract approximately 12 hours.
Dive Behavior
The bio-loggers that are attached to the hair of the nape or head of seals are capable of determining depth through a pressure transducer. This allows for a variety of data products that describe the dive behavior of seals.
Time At Depth from Cumulative Distribution
Here, dive behavior is described as proportion of time at given depths. This relatively new data product transmits a cumulative distribution of time at depth for each 2 hour summary period. The distribution adjusts to accomodate different maximum depths and darker red areas indicate depths where the seal is choosing to spend more time. The grey blocks above indicate proportion of time dry within the summary period.
Time At Depth from Histogram Bins
Two bio-loggers deployed on sub-adult spotted seals (SPENO: PL2024_1003, PL2024_1017) were programmed to collect time at depth information based on pre-defined histogram bins. The depth range encompassed by each bin is courser than with the above cumulative distribution data.
Dive Behavior Records
The two sub-adult spotted seals (SPENO: PL2024_1003, PL2024_1017) were also programmed to provide more detailed information regarding individual dives. For each dive, the start time, end time, and maximum depth are recorded. The subsequent post-dive interval at the surface is also recorded. This is bundled into 5 consecutive dive + post-dive intervals. In addition to providing information on dive depths and dive frequency we can also explore the overall distribution of dive duration.
Oceanographic Temperature Profiles
Approximately two times per day, the bio-loggers will record a temperature profile upcast from the deepest dive during a two hour summary period. This provides unique insight into the oceanography and structure of the water these seals are foraging in.
Satellite Transmissions
This figure provides some diagnostic and performance insights to tag deployments and attachment locations.
